docs: def add_jardiff_optgroup(parser):
      """
      option group specific to the tests in jardiff
      """
  
      og = parser.add_argument_group("JAR Checking Options")
  
      og.add_argument("--ignore-jar-entry", action="append", default=[])
  
      og.add_argument("--ignore-jar-signature",
                      action="store_true", default=False,
                      help="Ignore JAR signing changes")
  
      og.add_argument("--ignore-manifest",
                      action="store_true", default=False,
                      help="Ignore changes to manifests")
  
      og.add_argument("--ignore-manifest-subsections",
                      action="store_true", default=False,
                      help="Ignore changes to manifest subsections")
  
      og.add_argument("--ignore-manifest-key",
                      action="append", default=[],
                      help="case-insensitive manifest keys to ignore")